More info

This is the ID-12LA, a very simple to use RFID reader module from ID Innovations. With a built in antenna, the only holdup is the 2mm pin spacing (breakout board available below). Power the module, hold up a 125kHz card, and get a serial string output containing the unique ID of the card.

The new ID-12LA is essentially the same as the ID-12, but has a lower voltage input.